网络控制系统时变采样周期的建模与切换控制  

Modeling and switched control of networked control systems during time variable-period sampling

作　　者：刘义才[1,2] 刘斌 Liu Yicai;Liu Bin(Institute of Information Science&Engineering,Wuhan University of Science&Technology,Wuhan 430081,China;College of Mechatro-nics Engineering&Automotive Services,Wuhan Business University,Wuhan 430056,China)

机构地区：[1]武汉科技大学信息科学与工程学院,武汉430081 [2]武汉商学院机电工程与汽车服务学院,武汉430056

出　　处：《计算机应用研究》2018年第1期208-212,共5页Application Research of Computers

基　　金：武汉商学院科研资助项目(2016KY004)

摘　　要：针对具有双边随机时延和丢包的网络控制系统,采用了主动时变采样周期的方法,利用事件和时间驱动相结合方式,传感器的采样周期可实时地跟随网络延时和丢包的变化而改变,克服了长时延和数据包错序的问题。然后将系统建立为统一的切换系统模型,结合基于平均驻留时间的方法,给出了系统状态满足指数稳定的条件,并且描述了其指数衰减率和丢包率之间的定量关系。最后通过数值例仿真验证了所提方法的有效性。As for a class of networked control systems(NCS)with bilateral random network-induced delay and packet dropout,firstly this paper proposed the method of the active time varying-period sampling,which meant that the sensor was event and time-driven,and its sampling period could follow the change of network delay and packet dropout in real time,so the problem of long delay and packet disordering was overcome.Then it modeled the NCS as the discrete-time switched system,and obtained the condition satisfying exponential stability of the system state based on the approach of average dwell time.The obtained condition further established the quantitative relation between the exponential decay rate and the packet dropout rate.Lastly,the simulation examples illustrate the effectiveness of the proposed method.

关 键 词：网络控制系统 变采样周期 切换系统 网络诱导时延 丢包 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]